| Alcoguard Restart possible | The engine has been switched off for less than 30 minutes - engine starting possible without new test. |
| Alcoguard Service required | Contact a workshop. |
| Alcoguard No signal | Transmission failed - send manually with button (3) or take a new breath test. |
| Alcoguard Invalid test | Test failed - take a new breath test. |
| Alcoguard Blow longer | Blowing too short - blow for longer. |
| Alcoguard Blow softer | Blowing too hard - blow more gently. |
| Alcoguard Blow harder | Blowing too weak - blow harder. |
| Alcoguard wait Preheating | Heating not finished - wait for text Alcoguard Blow 5 seconds. |